import Vue from 'vue'
import VueI18n from 'vue-i18n'
// import Cookies from 'js-cookie'
import elementEnLocale from 'element-ui/lib/locale/lang/en' // element-ui lang
import elementZhLocale from 'element-ui/lib/locale/lang/zh-CN'// element-ui lang

const files = require.context(
  // 其组件目录的相对路径
  './',
  // 是否查询其子目录
  true,
  // 匹配基础组件文件名的正则表达式
  /\.js$/
)
let zhLang = {}; let enLang = {}
files.keys().forEach(fileName => {
  if (fileName.indexOf('zh') > -1) {
    zhLang = Object.assign(zhLang, files(fileName).default || files(fileName))
  } else if (fileName.indexOf('en') > -1) {
    enLang = Object.assign(enLang, files(fileName).default || files(fileName))
  }
})
Vue.use(VueI18n)

const messages = {
  en: {
    ...elementEnLocale,
    ...enLang
  },
  zh: {
    ...elementZhLocale,
    ...zhLang
  }
}
const newMessge = []
for (const key in messages.en) {
  messages.zh[key] ? '' : newMessge.push(key)
}
export function getLanguage () {
  // const chooseLanguage = Cookies.get('language')
  // if (chooseLanguage) return chooseLanguage

  // if has not choose language
  const language = (navigator.language || navigator.browserLanguage).toLowerCase()
  const locales = Object.keys(messages)
  for (const locale of locales) {
    if (language.indexOf(locale) > -1) {
      return locale
    }
  }
  return 'en'
}
const i18n = new VueI18n({
  // set locale
  // options: en | zh | es
  locale: getLanguage(),
  // set locale messages
  messages,
  silentTranslationWarn: true
})

export default i18n
